drawtext: specify union type for setting default options

Fix warnings of the type:
vf_drawtext.c:NNN: warning: missing braces around initializer
vf_drawtext.c:NNN: warning: (near initialization for ‘drawtext_options[X].default_val’)

libavfilter/vf_drawtext.c

@@ -86,37 +86,37 @@ typedef struct {
 #define OFFSET(x) offsetof(DrawTextContext, x)
 
 static const AVOption drawtext_options[]= {
-{"fontfile", "set font file",        OFFSET(fontfile),         FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },
-{"text",     "set text",             OFFSET(text),             FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },
-{"textfile", "set text file",        OFFSET(textfile),         FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },
-{"fontcolor","set foreground color", OFFSET(fontcolor_string), FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },
-{"boxcolor", "set box color",        OFFSET(boxcolor_string),  FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },
-{"shadowcolor", "set shadow color",  OFFSET(shadowcolor_string),  FF_OPT_TYPE_STRING, 0,  CHAR_MIN, CHAR_MAX },
-{"box",      "set box",              OFFSET(draw_box),         FF_OPT_TYPE_INT,    0,         0,        1 },
-{"fontsize", "set font size",        OFFSET(fontsize),         FF_OPT_TYPE_INT,   16,         1,       72 },
-{"x",        "set x",                OFFSET(x),                FF_OPT_TYPE_INT,    0,         0,  INT_MAX },
-{"y",        "set y",                OFFSET(y),                FF_OPT_TYPE_INT,    0,         0,  INT_MAX },
-{"shadowx",  "set x",                OFFSET(shadowx),          FF_OPT_TYPE_INT,    0,   INT_MIN,  INT_MAX },
-{"shadowy",  "set y",                OFFSET(shadowy),          FF_OPT_TYPE_INT,    0,   INT_MIN,  INT_MAX },
-{"tabsize",  "set tab size",         OFFSET(tabsize),          FF_OPT_TYPE_INT,    4,         0,  INT_MAX },
+{"fontfile", "set font file",        OFFSET(fontfile),           FF_OPT_TYPE_STRING, {.str=NULL},  CHAR_MIN, CHAR_MAX },
+{"text",     "set text",             OFFSET(text),               FF_OPT_TYPE_STRING, {.str=NULL},  CHAR_MIN, CHAR_MAX },
+{"textfile", "set text file",        OFFSET(textfile),           FF_OPT_TYPE_STRING, {.str=NULL},  CHAR_MIN, CHAR_MAX },
+{"fontcolor","set foreground color", OFFSET(fontcolor_string),   FF_OPT_TYPE_STRING, {.str=NULL},  CHAR_MIN, CHAR_MAX },
+{"boxcolor", "set box color",        OFFSET(boxcolor_string),    FF_OPT_TYPE_STRING, {.str=NULL},  CHAR_MIN, CHAR_MAX },
+{"shadowcolor", "set shadow color",  OFFSET(shadowcolor_string), FF_OPT_TYPE_STRING, {.str=NULL},  CHAR_MIN, CHAR_MAX },
+{"box",      "set box",              OFFSET(draw_box),           FF_OPT_TYPE_INT,    {.dbl=0},     0,        1        },
+{"fontsize", "set font size",        OFFSET(fontsize),           FF_OPT_TYPE_INT,    {.dbl=16},    1,        72       },
+{"x",        "set x",                OFFSET(x),                  FF_OPT_TYPE_INT,    {.dbl=0},     0,        INT_MAX  },
+{"y",        "set y",                OFFSET(y),                  FF_OPT_TYPE_INT,    {.dbl=0},     0,        INT_MAX  },
+{"shadowx",  "set x",                OFFSET(shadowx),            FF_OPT_TYPE_INT,    {.dbl=0},     INT_MIN,  INT_MAX  },
+{"shadowy",  "set y",                OFFSET(shadowy),            FF_OPT_TYPE_INT,    {.dbl=0},     INT_MIN,  INT_MAX  },
+{"tabsize",  "set tab size",         OFFSET(tabsize),            FF_OPT_TYPE_INT,    {.dbl=4},     0,        INT_MAX  },
 
 /* FT_LOAD_* flags */
-{"ft_load_flags", "set font loading flags for libfreetype",   OFFSET(ft_load_flags),  FF_OPT_TYPE_FLAGS,  FT_LOAD_DEFAULT|FT_LOAD_RENDER, 0, INT_MAX, 0, "ft_load_flags" },
-{"default",                     "set default",                     0, FF_OPT_TYPE_CONST, FT_LOAD_DEFAULT,                     INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_scale",                    "set no_scale",                    0, FF_OPT_TYPE_CONST, FT_LOAD_NO_SCALE,                    INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_hinting",                  "set no_hinting",                  0, FF_OPT_TYPE_CONST, FT_LOAD_NO_HINTING,                  INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"render",                      "set render",                      0, FF_OPT_TYPE_CONST, FT_LOAD_RENDER,                      INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_bitmap",                   "set no_bitmap",                   0, FF_OPT_TYPE_CONST, FT_LOAD_NO_BITMAP,                   INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"vertical_layout",             "set vertical_layout",             0, FF_OPT_TYPE_CONST, FT_LOAD_VERTICAL_LAYOUT,             INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"force_autohint",              "set force_autohint",              0, FF_OPT_TYPE_CONST, FT_LOAD_FORCE_AUTOHINT,              INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"crop_bitmap",                 "set crop_bitmap",                 0, FF_OPT_TYPE_CONST, FT_LOAD_CROP_BITMAP,                 INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"pedantic",                    "set pedantic",                    0, FF_OPT_TYPE_CONST, FT_LOAD_PEDANTIC,                    INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"ignore_global_advance_width", "set ignore_global_advance_width", 0, FF_OPT_TYPE_CONST, FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH, INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_recurse",                  "set no_recurse",                  0, FF_OPT_TYPE_CONST, FT_LOAD_NO_RECURSE,                  INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"ignore_transform",            "set ignore_transform",            0, FF_OPT_TYPE_CONST, FT_LOAD_IGNORE_TRANSFORM,            INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"monochrome",                  "set monochrome",                  0, FF_OPT_TYPE_CONST, FT_LOAD_MONOCHROME,                  INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"linear_design",               "set linear_design",               0, FF_OPT_TYPE_CONST, FT_LOAD_LINEAR_DESIGN,               INT_MIN, INT_MAX, 0, "ft_load_flags" },
-{"no_autohint",                 "set no_autohint",                 0, FF_OPT_TYPE_CONST, FT_LOAD_NO_AUTOHINT,                 INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"ft_load_flags", "set font loading flags for libfreetype",   OFFSET(ft_load_flags),  FF_OPT_TYPE_FLAGS,  {.dbl=FT_LOAD_DEFAULT|FT_LOAD_RENDER}, 0, INT_MAX, 0, "ft_load_flags" },
+{"default",                     "set default",                     0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_DEFAULT},                     INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_scale",                    "set no_scale",                    0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_SCALE},                    INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_hinting",                  "set no_hinting",                  0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_HINTING},                  INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"render",                      "set render",                      0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_RENDER},                      INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_bitmap",                   "set no_bitmap",                   0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_BITMAP},                   INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"vertical_layout",             "set vertical_layout",             0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_VERTICAL_LAYOUT},             INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"force_autohint",              "set force_autohint",              0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_FORCE_AUTOHINT},              INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"crop_bitmap",                 "set crop_bitmap",                 0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_CROP_BITMAP},                 INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"pedantic",                    "set pedantic",                    0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_PEDANTIC},                    INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"ignore_global_advance_width", "set ignore_global_advance_width", 0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH}, INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_recurse",                  "set no_recurse",                  0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_RECURSE},                  INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"ignore_transform",            "set ignore_transform",            0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_IGNORE_TRANSFORM},            INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"monochrome",                  "set monochrome",                  0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_MONOCHROME},                  INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"linear_design",               "set linear_design",               0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_LINEAR_DESIGN},               INT_MIN, INT_MAX, 0, "ft_load_flags" },
+{"no_autohint",                 "set no_autohint",                 0, FF_OPT_TYPE_CONST, {.dbl=FT_LOAD_NO_AUTOHINT},                 INT_MIN, INT_MAX, 0, "ft_load_flags" },
 {NULL},
 };